PDS_VERSION_ID = PDS3
LABEL_REVISION_NOTE = "
1997-01-02, W.S. Kurth, original draft - Io orbit 0;
2003-02-11, S.P. Joy, major revision -
all orbits into single data set, tables added,
missing keyword/values added;
2003-08-18, S. Joy, minor revisions requested at peer review;"
OBJECT = DATA_SET
DATA_SET_ID = "GO-J-PWS-2-REDR-RTS-SA-FULL-V1.0"
OBJECT = DATA_SET_INFORMATION
DATA_SET_NAME = "
GO JUP PWS REFORMATTED REALTIME SPECTRUM ANALYZER FULL V1.0"
DATA_SET_COLLECTION_MEMBER_FLG = "N"
START_TIME = 1995-12-07T15:21
STOP_TIME = 2003-09-21T18:45
DATA_SET_RELEASE_DATE = 1997-01-02
PRODUCER_FULL_NAME = "DR. WILLIAM S. KURTH"
DATA_OBJECT_TYPE = TABLE
DETAILED_CATALOG_FLAG = Y
ARCHIVE_STATUS = "LOCALLY ARCHIVED"
CITATION_DESC = "
Gurnett, D.A., Kurth, W.S., Granroth, L.J.,
GO JUP PWS REFORMATTED REALTIME SPECTRUM ANALYZER FULL V1.0,
GO-J-PWS-2-REDR-RTS-SA-FULL-V1.0, NASA Planetary Data System, 1997"
ABSTRACT_DESC = "
This data set includes full resolution electric and magnetic wave
spectra obtained during the period for which real time science data
was acquired from the Galileo plasma wave receiver during Jupiter
orbital operations. The parameters provided for both the electric
and magnetic field spectral data are uncalibrated data numbers.
Software and calibration tables provided as part of this data set
allow for fully calibrated data for the electric field measurements
in raw data numbers, voltage at the antenna inputs (V), electric
field (V/m), electric field spectral density (V**2/m**2/Hz), or
power flux (W/m**2/Hz). The magnetic field measurements can be
provided in units of magnetic field spectral density (nT**2/Hz).
The sources of these data are the High Frequency Receiver, Sweep
Frequency Receiver, and Spectrum Analyzer which make up the Low
Rate Science portion of the PWS."
DATA_SET_TERSE_DESC = "
Full resolution electric and magnetic wave spectra acquired by
the Galileo PWS instrument at Jupiter in real-time science telemetry
mode. The spectral densities are provided in units of
V**2/m**2/Hz (electric) and nT**2/Hz (magnetic)."
DATA_SET_DESC = "
This data set includes full resolution electric and magnetic wave
spectra obtained during the period for which real time science data
was acquired from the Galileo plasma wave receiver during Jupiter
orbital operations. The parameters provided for both the electric
and magnetic field spectral data are uncalibrated data numbers.
Software and calibration tables provided as part of this data set
allow for fully calibrated data for the electric field measurements
in raw data numbers, voltage at the antenna inputs (V), electric
field (V/m), electric field spectral density (V**2/m**2/Hz), or
power flux (W/m**2/Hz). The magnetic field measurements can be
provided in units of magnetic field spectral density (nT**2/Hz).
The sources of these data are the High Frequency Receiver, Sweep
Frequency Receiver, and Spectrum Analyzer which make up the Low
Rate Science portion of the PWS. During most of the included
time interval, the instrument cycled between the electric and
magnetic antennas for the Sweep Frequency Receiver and the Spectrum
Analyzer. The High Frequency Receiver is always connected to the
electric antenna. Hence, for the Sweep Frequency Receiver and the
Spectrum Analyzer, the temporal resolution for electric
measurements is basically one spectrum per 37.33 seconds. These
data are acquired through Phase 2 software and there is only one
measurement for each of the Spectrum Analyzer, Sweep Frequency
Receiver and High Frequency Receiver channels. The upper six
channels of the Sweep Frequency Receiver (which overlap with
High Frequency Receiver channels) are not sampled at all.
This data set is highly discontinuous in time. Because of the severe
limitations in the downlink capability of the Galileo spacecraft,
data were acquired for only selected portions of each orbit. During
the prime mission (first 12 orbits), continuous data were acquired
inside of 50 Rj for all orbits, with a few select orbits having
complete or nearly complete coverage in the Real-Time Science (RTS)
telemetry mode. During most of the Galileo Europa Mission (GEM) and
Galileo Millennium Mission (GMM) coverage was more limited, typically
only a few days around perijove, except for the Cassini encounter
period (orbits 28 and 29) and orbits where recorded data were lost
due to spacecraft safings or other mishaps. Table 1 below provides
a listing of the start and stop times of the data for each orbit.
Some orbits (5 and 13) have no coverage due to solar conjunctions.
Table 2 below provides basic information about the orbits and
orbital geometry. After the insertion orbit, which dipped as low as
five degrees south, the Galileo remained within a degree of the
jovian equator.
-----------------------------------------------------------------
Table 1. PWS Summary Data Coverage
-----------------------------------------------------------------
Orbit Start Time Stop Time Notes
-----------------------------------------------------------------
JA-Io 1995-12-07 15:21 1995-12-08 01:26
J00 1996-05-23 20:02 1996-06-01 00:30
G01 1996-06-23 16:02 1996-07-04 00:00
G01 1996-08-07 00:00 1996-08-24 14:27 1
G02 1996-08-31 10:50 1996-10-22 10:02
C03 1996-10-31 12:07 1996-11-11 18:31
E04 1996-12-13 19:17 1996-12-21 15:07
J05 2
E06 1997-02-17 06:01 1997-02-26 04:49
G07 1997-03-19 05:42 1997-04-21 16:01
G08 1997-05-04 00:31 1997-06-22 00:00
C09 1997-06-22 00:00 1997-09-14 00:00 3
C10 1997-09-14 00:00 1997-10-04 00:00 3
E11 1997-11-02 01:24 1997-11-09 16:01
E12 1997-12-15 08:05 1997-12-16 12:29
J13 2
E14 1998-03-28 13:02 1998-03-31 02:12
E15 1998-05-30 21:04 1998-06-01 09:10
E16 1998-07-20 05:09 1998-07-21 00:00
E16 1998-07-24 00:00 1998-09-19 03:01 4
E17 1998-09-25 11:09 1998-09-27 01:59
E18 1998-11-21 12:04 1998-12-31 00:00
E19 1999-01-31 02:08 1999-02-02 00:00
E19 1999-02-11 00:00 1999-02-11 05:59
C20 1999-05-02 17:06 1999-05-15 04:04
C21 1999-06-29 07:05 1999-07-03 10:48
C22 1999-08-11 14:06 1999-08-14 10:34
C23 1999-09-13 20:05 1999-09-27 16:31
I24 1999-10-10 04:05 1999-11-01 17:58
I25 1999-11-25 04:05 1999-11-27 01:32
E26 2000-01-01 23:31 2000-01-05 01:55
E26 2000-02-20 03:33 2000-02-21 00:00 3
I27 2000-02-21 00:00 2000-02-23 18:05
G28 2000-05-19 04:06 2000-06-14 00:00
G28 2000-10-26 00:00 2000-12-27 00:00 5
G29 2000-12-27 00:00 2001-02-05 19:56 5,3
C30 2001-05-23 12:02 2001-05-26 08:28
I31 2001-08-05 05:18 2001-08-07 16:32
I32 2001-10-14 02:10 2001-10-27 00:00
I33 2002-01-04 00:00 2002-01-15 00:00
I33 2002-10-26 13:32 2002-11-03 00:00 3
A34 2002-11-03 00:00 2002-11-05 06:32
J35 2003-09-21 08 2003-09-21 18 6
Notes:
1 Data collected inbound to the beginning of next orbit
2 No data - solar conjunction
3 Data continuous with previous orbit
4 Additional data returned after spacecraft safing
5 Joint observation with Cassini
6 Times approximate, Jupiter impact
-------------------------------------------------------------------
Table 2. Galileo Orbit Information
-------------------------------------------------------------------
Orbit <--- Periapsis Info ----> <-- Apoapsis Info -->
Start Periapsis Range Local Apoapsis Range Local
Orb Date Date/Time <Rj**> Time Date <Rj> Time
-------------------------------------------------------------------
J00 95-12-03 95-12-07 21:54 4.00 16:21 96-03-29 267.7 03:39
G01 96-06-23 96-06-28 00:31 11.03 15:36 96-08-09 125.3 03:24
G02 96-09-01 96-09-07 13:38 10.65 15:22 96-10-07 113.0 03:12
C03 96-11-02 96-11-06 13:31 9.21 15:34 96-11-27 89.1 03:28
E04 96-12-15 96-12-19 03:22 9.16 15:21 97-01-04 72.1 03:00
J05* 97-01-15 97-01-20 00:26 9.05 14:54 97-02-04 72.1 02:48
E06 97-02-16 97-02-20 20:55 9.12 14:28 97-03-14 89.2 02:20
G07 97-03-30 97-04-04 11:03 9.12 14:14 97-04-21 75.9 01:56
G08 97-05-04 97-05-08 11:42 9.27 13:29 97-06-02 100.2 01:21
C09 97-06-22 97-06-27 11:52 10.77 12:35 97-08-08 143.0 00:21
C10 97-09-14 97-09-18 23:10 9.17 12:44 97-10-13 98.9 00:36
E11 97-11-02 97-11-06 23:02 9.03 12:36 97-11-26 84.1 00:29
E12 97-12-15 97-12-16 06:35 8.80 12:29 97-12-20 46.6 00:37
J13* 98-02-09 98-02-10 23:09 8.85 12:33 98-03-06 95.2 00:25
E14 98-03-28 98-03-29 07:59 8.83 12:17 98-04-30 199.7 00:16
E15 98-05-30 98-06-01 02:34 8.85 12:12 98-06-26 100.4 00:03
E16 98-07-20 98-07-20 17:18 9.93 11:54 98-08-23 124.4 23:51
E17 98-09-25 98-09-26 08:26 8.91 11:44 98-10-24 110.4 23:34
E18 98-11-21 98-11-22 03:57 9.23 11:24 98-12-27 129.0 23:17
E19 99-01-31 99-02-01 02:38 9.24 10:56 99-03-18 154.3 22:40
C20 99-05-02 99-05-03 17:00 9.37 10:24 99-06-02 114.5 21:46
C21 99-06-29 99-07-02 05:04 7.27 10:04 99-07-22 89.0 21:57
C22 99-08-11 99-08-12 10:58 7.32 09:50 99-08-29 77.1 21:23
C23 99-09-13 99-09-14 19:57 6.55 09:17 99-09-27 65.7 20:46
I24 99-10-10 99-10-11 03:31 5.68 08:41 99-11-01 97.7 20:47
I25 99-11-25 99-11-26 23:30 5.94 08:39 99-12-15 87.2 20:28
E26 00-01-01 00-01-04 03:33 5.78 08:14 00-01-28 102.7 20:05
I27 00-02-20 00-02-22 12:30 5.85 07:56 00-04-06 154.4 19:55
G28 00-05-17 00-05-21 04:52 6.68 07:18 00-09-08 289.9 18:37
G29 00-12-27 00-12-29 03:26 7.49 06:03 01-03-11 216.3 17:37
C30 01-05-07 01-05-23 17:33 7.28 05:11 01-06-29 136.8 16:27
I31 01-08-04 01-08-06 04:52 5.93 04:14 01-09-10 132.2 16:05
I32 01-10-14 01-10-15 23:56 5.78 03:53 01-12-01 160.7 15:39
I33 02-01-16 02-01-17 16:23 5.54 03:13 02-06-13 348.1 14:21
A34 02-11-04 02-11-05 07:23 1.99 01:40 03-04-14 336.7 12:49
J35 03-09-21 03-09-21 18:57 Entry time
* Solar conjunction - no data from this orbit
** Rj = 71492 km"
CONFIDENCE_LEVEL_NOTE = "
This data set includes all available Low Rate Science spectrum
analyzer data within the interval of time covered. Because of the
compressed nature of the data, there are typically no telemetry
errors. If such errors occur, successful decompression of the data
is not possible and the ~5 minute interval of data containing the
error simply appears as a data gap. However, the Reed-Solomon
encoding of the telemetry stream and the conservative nature of the
telemetry link margin results in very few packets being lost to
telemetry errors. The lossy integer cosine transform used to
compress the data by ~13:1 results in amplitude uncertainties of the
order of 5 dB. At less severe compression ratios, the errors are
significantly less. The magnetic spectra contain narrowband
interference lines at 2.4 kHz and harmonics. Occasionally, magnetic
noise interference between about 200 Hz and 2 kHz due to UVS grating
motor activity can be observed. Periodic bursts below about 100 Hz
are due to a stepper motor in the Energetic Particle Detector.
Missing data are indicated by zero.
At about 1712 SCET on 14 September (day 257) 1997 the low-frequency
search coil, or some portion of the PWS electronics associated with
the signals acquired by this sensor suffered a failure which
increased the noise level and decreased the sensitivity for magnetic
signals below 2.4 kHz. Some natural signals can be observed in this
frequency range after the failure, but no attempt has been made as
of this date to recalibrate the output of this sensor. After some
on-board testing of the affected systems it was decided to only use
the search coils inside of about 15 RJ for the duration of the
mission. Inside this distance, it is most likely that intense
electromagnetic signatures might still be detected in the anomalous
sensor state. Outside of 15 RJ, the instrument is in an electric
field-only mode.
In the electric field-only mode, every 18.67-second sweep of the
spectrum analyzer and medium frequency receiver is from the electric
dipole antenna, effectively improving the temporal resolution of
the electric field measurements below 100 kHz by a factor of two.
The high frequency receiver above 100 kHz also sweeps once per 18.67
seconds, only on the electric antenna."
END_OBJECT = DATA_SET_INFORMATION
OBJECT = DATA_SET_TARGET
TARGET_NAME = JUPITER
END_OBJECT = DATA_SET_TARGET
OBJECT = DATA_SET_TARGET
TARGET_NAME = IO
END_OBJECT = DATA_SET_TARGET
OBJECT = DATA_SET_TARGET
TARGET_NAME = EUROPA
END_OBJECT = DATA_SET_TARGET
OBJECT = DATA_SET_TARGET
TARGET_NAME = GANYMEDE
END_OBJECT = DATA_SET_TARGET
OBJECT = DATA_SET_TARGET
TARGET_NAME = CALLISTO
END_OBJECT = DATA_SET_TARGET
OBJECT = DATA_SET_TARGET
TARGET_NAME = AMALTHEA
END_OBJECT = DATA_SET_TARGET
OBJECT = DATA_SET_TARGET
TARGET_NAME = "IO PLASMA TORUS"
END_OBJECT = DATA_SET_TARGET
OBJECT = DATA_SET_HOST
INSTRUMENT_HOST_ID = GO
INSTRUMENT_ID = PWS
END_OBJECT = DATA_SET_HOST
OBJECT = DATA_SET_REFERENCE_INFORMATION
REFERENCE_KEY_ID = "N/A"
END_OBJECT = DATA_SET_REFERENCE_INFORMATION
END_OBJECT = DATA_SET
END